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Apparatus, system, and method for image registration

a technology of image registration and apparatus, applied in the field of print registration, can solve the problems of increasing the cost of the registration detection device b>200, and achieve the effect of reducing the cost of the registration detection devi

Inactive Publication Date: 2008-07-01
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an improved process, apparatus, and system for image registration that overcomes the shortcomings of current image registration devices. The invention includes a plurality of modules that function to receive light, sum the light, and detect light transitions. The system includes a control module to adjust the position of the images based on mis-registration. The technical effects of the invention include improved accuracy and efficiency in image registration.

Problems solved by technology

It is a drawback of such a system that the registration detection device 200 must include at least two optical sensors to register the images on the page 105.
Two optical sensors and the sophisticated logic increase the cost of the registration detection device 200.

Method used

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  • Apparatus, system, and method for image registration

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Embodiment Construction

[0033]Many of the functional units described in this specification have been labeled as modules, in order to more particularly emphasize their implementation independence. For example, a module may be implemented as a hardware circuit comprising custom VLSI circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

[0034]Modules may also be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in d...

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Abstract

An apparatus, system and method of print registration are provided. The invention includes first and second optical channel modules configured to communicate light from a page to a sensor module. The sensor module sums the light from the first and second optical channel modules and detects one or more light transitions as a first registration mark of a first image of the page moves past the first optical sensor module and as a second registration mark of a second image of the page moves past the second optical channel module. The invention determines that the first image and the second image are registered if the sensor module detects a single light transition as the first registration mark and the second registration mark pass the first and the second optical channel modules. In addition, the invention determines that the first image and the second image are mis-registered if the sensor module detects a plurality of light transitions as the first registration mark and the second registration mark pass the first and the second optical channel modules.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates to print registration and more particularly relates to image registration with a single optical sensor.[0003]2. Description of the Related Art[0004]Printing systems such as duplex image printing systems and color image printing systems often register two or more separate images on one or two sides of a page. The page may be paper, a printed form, a continuous feed printed form, or a carton. Registration involves aligning each image in a desired position relative to each other image or images. Images are mis-registered when one or more images are not aligned as desired relative to the other images.[0005]For example, a duplex printing system prints a first image on the anterior side of a page and a second image on the posterior side of the page. The first image and the second image are considered to be registered if they are aligned relative to each other so that the first image and the second image...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B41J2/385B41J2/435G01D15/06B41J3/60B41J11/46B41J15/14
CPCB41J11/46B41J3/60
Inventor BRADLEY, TIMOTHY G.FIRMATURE, ROBERT J.
Owner RICOH KK
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